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public final class Equality {
/**
* @param o an object
* @param a an object to be compared with {@code o} for equality
* @return true if the arguments are equal to each other and false otherwise
*/
public static <O> boolean eq(@Nullable O o, @Nullable O a) {
return Objects.equals(o, a);
}
/**
* @param o an object
* @param a an object to be compared with {@code o} for equality
* @return true if the any arguments are equal to each other and false otherwise
*/
public static <O> boolean eqAny(@Nullable O o, @Nullable O a) {
return eq(o, a);
}
/**
* @param o an object
* @param a an object to be compared with {@code o} for equality
* @param b an object to be compared with {@code o} for equality
* @return true if the any arguments are equal to each other and false otherwise
*/
public static <O> boolean eqAny(@Nullable O o, @Nullable O a, @Nullable O b) {
return eq(o, a) || eq(o, b);
}
/**
* @param o an object
* @param a an object to be compared with {@code o} for equality
* @param b an object to be compared with {@code o} for equality
* @param c an object to be compared with {@code o} for equality
* @return true if the any arguments are equal to each other and false otherwise
*/
public static <O> boolean eqAny(@Nullable O o, @Nullable O a, @Nullable O b, @Nullable O c) {
return eqAny(o, a, b) || eq(o, c);
}
/**
* @param o an object
* @param a an object to be compared with {@code o} for equality
* @param b an object to be compared with {@code o} for equality
* @param c an object to be compared with {@code o} for equality
* @param d an object to be compared with {@code o} for equality
* @return true if the any arguments are equal to each other and false otherwise
*/
public static <O> boolean eqAny(@Nullable O o, @Nullable O a, @Nullable O b, @Nullable O c, @Nullable O d) {
return eqAny(o, a, b, c) || eq(o, d);
}
/**
* @param o an object
* @param a an object to be compared with {@code o} for equality
* @param b an object to be compared with {@code o} for equality
* @param c an object to be compared with {@code o} for equality
* @param d an object to be compared with {@code o} for equality
* @param e an object to be compared with {@code o} for equality
* @return true if the any arguments are equal to each other and false otherwise
*/
public static <O> boolean eqAny(@Nullable O o, @Nullable O a, @Nullable O b, @Nullable O c, @Nullable O d, @Nullable O e) {
return eqAny(o, a, b, c, d) || eq(o, e);
}
/**
* @param o an object
* @param a an array of objects to be compared
* @return true if any the arguments are equal to each other and false otherwise
*/
public static <O> boolean eqAny(@Nullable O o, O... a) {
for(O e: a)
if(eq(o, e))
return true;
return false;
}
}
Мой любимый класс.
Когда на душе становится тяжело, я всегда открываю этот класс, и признаки депрессии улетучиваются.
И да, комментарии врут, и да, там еще столько же методов eqAll(...)
Эх, вот словно питон запустил.
Удивление существа с 3 глазами.
В целях борьбы с "критическими" ворнингами sonar, который запрещал собираться по трое писать больше трёх условий в одном выражении. Особенно это напрягало в переопределении equals.